Browsing by Author "Hacivelioglu, Feray"

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Citation Count: 11
Diffraction at a Rectangular Plate: First-Order PTD Approximation
(Ieee-inst Electrical Electronics Engineers inc, 2016) Apaydin, Gokhan; Hacivelioglu, Feray; Sevgi, Levent; Gordon, William B.; Ufimtsev, Pyotr Ya.
Physical theory of diffraction (PTD) is developed for the field scattered at a perfectly conducting rectangular plate. Grazing incidence and grazing scattering are analyzed. High-frequency asymptotic estimations are derived. Bistatic and monostatic scenarios are considered. Comparison is presented with known experimental and numeric results obtained by the method of moments (MoM).
Citation Count: 2
Diffraction at trilateral cylinders with combinations of soft and hard faces: first-order PTD approximation
(Taylor & Francis inc, 2018) Hacivelioglu, Feray; Apaydin, Gokhan; Sevgi, Levent; Ufimtsev, Pyotr Ya.
The paper investigates diffraction at trilateral cylinders with combinations of soft (electric) and hard (magnetic) faces. Scattered field in far zone is calculated according to the physical theory of diffraction. The first-order high-frequency approximation is constructed as a sum of single-diffracted edge waves. Plotted numerical data clearly demonstrate the difference for objects with different faces. Substantial suppression of backscattering is observed for cylinders with soft-hard illuminated faces. Fringe wave contributions to the scattered field are shown. Physical theory of diffraction results are compared with those of the physical optics and confirmed by the method of moments.
Citation Count: 9
Fringe Waves from a Wedge With One Face Electric and the Other Face Magnetic
(Ieee-inst Electrical Electronics Engineers inc, 2016) Apaydin, Gokhan; Hacivelioglu, Feray; Sevgi, Levent; Ufimtsev, Pyotr Ya
Fringe waves represent the diffracted field generated by the nonuniform/fringe surface currents concentrated in vicinity of sharp scattering edges. For perfectly conducting wedges, they have been studied in a number of publications. In this communication, fringe waves for a wedge with one face electric and the other magnetic are analyzed analytically and numerically.